Free Unit Converter – Convert Length, Weight, Temperature & More
Introduction
Need to convert units? Our Unit Converter Tool instantly converts between metric and imperial units for length, weight, temperature, and speed. Perfect for cooking, construction, science, and international communication.
This free tool supports all common units with precise conversions.
Common Use Cases
Unit conversion for every need:
Cooking & Recipes
- Convert cups to milliliters
- Ounces to grams
- Fahrenheit to Celsius
- International recipe adaptation
Construction & DIY
- Feet to meters
- Inches to centimeters
- Pounds to kilograms
- Material quantity calculations
Science & Education
- Lab measurements
- Physics calculations
- Chemistry conversions
- Academic assignments
Travel & International
- Speed limits (mph to km/h)
- Weather temperatures
- Distance calculations
- Weight restrictions
How to Use the Tool
Converting units is simple:
Step 1: Select category (Length, Weight, Temperature, Speed)
Step 2: Enter value to convert
Step 3: Choose "From" unit
Step 4: Choose "To" unit
Step 5: View instant conversion
Measurement Systems
Understanding different systems:
Metric System (SI)
Based on powers of 10, used worldwide. Units: meter, gram, liter, Celsius.
Imperial System
Used primarily in USA. Units: foot, pound, gallon, Fahrenheit.
US Customary
Similar to Imperial with slight differences in volume measurements.
📝 Example:
Length: 5 feet = 1.524 meters
Weight: 10 pounds = 4.536 kilograms
Temperature: 75°F = 23.9°C
Speed: 60 mph = 96.56 km/h
Length Conversions
Common length units:
Metric
- Kilometer (km) = 1000 meters
- Meter (m) = base unit
- Centimeter (cm) = 0.01 meters
- Millimeter (mm) = 0.001 meters
Imperial
- Mile (mi) = 5280 feet
- Yard (yd) = 3 feet
- Foot (ft) = 12 inches
- Inch (in) = base unit
Weight Conversions
Common weight units:
Metric
- Kilogram (kg) = 1000 grams
- Gram (g) = base unit
- Milligram (mg) = 0.001 grams
Imperial
- Pound (lb) = 16 ounces
- Ounce (oz) = base unit
- Stone (st) = 14 pounds
Temperature Conversions
Temperature scales:
Celsius (°C)
Water freezes at 0°C, boils at 100°C. Used worldwide.
Fahrenheit (°F)
Water freezes at 32°F, boils at 212°F. Used in USA.
Kelvin (K)
Absolute zero at 0K. Used in science.
Best Practices
Accurate unit conversion:
Know Your Context
Use appropriate precision for your application.
Double-Check Critical Conversions
For construction, medicine, or safety, verify conversions.
Understand Rounding
Know when to round and when precision matters.
Common Mistakes to Avoid
Don't fall into these traps:
Confusing Units
Problem: Mixing up oz (weight) and fl oz (volume)
Solution: Clarify unit type before converting
Wrong Formula
Problem: Using incorrect temperature formula
Solution: Use our calculator for accuracy
Privacy and Security
Your data is completely safe:
- No Data Storage: We never save conversions
- Client-Side Processing: All calculations in your browser
- No Account Required: Use anonymously
Conclusion
Unit conversion is essential for cooking, construction, science, and international communication. Whether you're following a recipe, building a project, or traveling abroad, our free unit converter provides instant, accurate conversions.
No downloads, no registration, and complete privacy. Start converting units today!